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2-5 Wiring and Connections
This section provides basic information on wiring the Power Supply Unit and I/O
Units, and on connecting Peripheral Devices.
2-5-1 AC Power Supply Unit Wiring
The following diagram shows the proper connection to an AC power supply. The
AC voltage should be between 100 and 240 VAC. Refer to 2-2-3 Selecting a
Power Supply Unit for details on Power Supply Unit capacity.
Remove the seal from the top of the Power Supply Unit only after wiring is com-
pleted. This seal must be removed before operating the Unit to prevent over-
heating.
An insulating transformer greatly
reduces the noise that may be
induced between the power line and
ground. Do not ground the secondary
side of the insulating transformer.
The cross-sectional area of each wire must be 2 mm
2
min.
Twist the wires.
Insulating transformer
Breaker
AC power supply
Caution Be sure that the AC power supply voltage remains within the allowed fluctuation
range of 85 to 264 VAC.
CQM1-PA216 is switchable with an input voltage range of 80 to 138 VAC or 160
to 264 VAC.
Terminal Block The following diagram shows the terminal blocks for the two AC Power Supply
Units.
CQM1-PA203
LG
GR
CQM1-PA206
AC
input
Use an AC
power supply
between 100
and 240 VAC.
Use the 24 VDC,
0.5 A terminals
to supply power
to DC Input
Units.
AC
input
Use an AC
power supply
between 100
and 240 VAC.
Noise filter
neutral
terminal
Protective
earth ter-
minal
Noise filter
neutral
terminal
Protective
earth terminal
CQM1-PA216
AC
input
Use an AC
power supply of
100 or
230 VAC.
Use the 24 VDC,
0.5 A terminals
to supply power
to DC Input
Units.
Voltage selector
Short: 100 VAC
Open: 230 VAC
Protective
earth terminal
The wire used should be at least 2 mm
2
. Provide the grounding point as close to
the CQM1 PC as possible.
WARNING LG ( or ):
Noise filter neutral terminal. Short-circuit the LG ( or ) terminal and GR ( )
terminals using the attached short-circuit bar and ground them at a resistance of
less than 100 Ω to reduce noise and prevent electric shock.
Wiring and Connections
Section 2-5
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